Hot-air furnace



(No Model.) s Sheets-Sheet 1. H. J. NOYES.

HOT AIR FURNACE.

Patented Aug. 7, 1894.

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(No Model.) s Sheets Sheet 2. H J NOYES HOT AIR FURNACE.

Patented Aug. 7, 1894.

S e S S V e n 10 W Inventor:

(Leaf UNITED STATES PATENT Cl r ce.

HORATIO J. NOYES, OF ASHTABULA, OHIO..

' HOT- AlR FURNACE.

SPECIFICATION forming part of Letters Patent No. 523,990,,dated August7, 1894.

7 Application filed October 5, 1892- Serial No. 447,963. (No model.)

To aZZ whom it may concern:

Be it known that I, HORATIO J. N OYES, a citizen of the United States,residing at Ashtabula, in the county of Ashtabula and State of Ohio,have invented acertain new and Improved Hot-Air Furnace, of which thefollowing is a full, clear, and exact description.

The nature of my invention relates to improvements in that class offurnaces used for heating dwellings, factories, &c., and consists in themethod of radiation, the arrangement and construction of the variousfines, and a coking device hereinafter fully explained.

The object of my improvement is to provide a strong, serviceable andeconomical f urnace.

That my invention may be seen and fully understood by others, referencewill be had to the following specification and annexed drawings forminga part thereof, in which Figure l is a front elevation of my furnace;Fig. 2, a side elevation; Fig. 3, a top view; Fig. 4, a view of theunder side of the top portion, detached; Fig. 5, a view illustrating themeans of attaching the chimney vpipe to thefurnace; Fig.6, a transverse,vertical section of the furnace casing showing the direct course of theproducts of combustion; Fig. 7, alongltudinal, vertical section of saidcasing showing the indirect course of said products; Figs. 8, 9 and 10,detached views of the flue cleaning device; Fig. 11, a vertical,longitudinal section of a portion of the furnace showing a sectionthrough the middle of the cok- -ing device; Fig. 12, an end view of thecoking device, detached; Fig. 13, a cross-section of said device; Fig.14, an interior view showing one of the inclined shelves or lugs onwhich the coking device rests; Fig. 15, a rear view of the furnace withthe fiues detached; and Fig. 16, a side view of the fire-pot andash-pit, detached.

Similar letters and figures of reference des-. ignate like parts in thedrawings and specification.

It will be understood that the ordinary casing is used in connectionwith my furnace, said casing not being shown in the drawings.

Referring to Figs. 1, 2 and 3, the radiating pipes are represented bythe numerals 1, 2, 3, 4, 5, 6, 7 and 8. These pipes are in opencommunication with each other and form a continuous radiating circuit,through the medium of the connections 9, 10, 11 and 12 and the cap orupper combustion chamber 0', Figs. 2 and 15, for the products ofcombustion emanating from the burning fuel in the fire pot. There arefour equal passages in the cap 13 through which the products ofcombustion pass and from thence down the radiating pipes l, 4, 5 and 8,around through the connections 9,10, 11 and 12 and up again through theradiating pipes 2, 3,6 and 7 into the expanding chamber 14, Figs. 4, 6and 7, and thence out through one common passage pipe 16 to the chimneyflue. A, casing of galvanized iron (or it may be of brick) surroundingthe furnace, in proper proportions, is supplied with air inlets, at thebase'of the furnace, to admit air to be heated.

The heat radiating from the furnace causes the air received at the baseof the casing to expand and rise to the top of said casing, or warm airchamber, which is connected with pipes leading therefrom to rooms orapartments to be supplied with heat. The passage being continuous uparound the furnace and radiating pipes 1, 2, 3, 4, 5, 6, 7 and 8, causesthe products of combustion whichpass through said pipes to becomereduced in temperature, lower in fact than that required for sustainingcombustion in the fire pot. Therefore the expanding chamber 14,receiving the waste heat from the top of the combustion chamber,re-expands the products of combustion received therein from theradiating pipes, and causes the passage of draft through pipe 16 andchimney flue to be accelerated, thereby rendering an exposure of a muchgreater surface to the air than would otherwise be without said chamber14. In the construction of the furnace, more or less radiating pipes maybe used without departing from the nature of my invention. The above isthe result if the damper 15 is closed,as shown in Figs. 4, 6 and 7,should this damper be left open however, the draftwould be direct.

The damper 15 may be operated by any suitable means, as by a rodconnected therewith and extending to the front of the furnace.

The radiating pipes may be sheet-steel or castiron with flangedconnections with the cap 13 and lower couplin gsand of any desiredlength,

the material and length of said pipes not being arbitrary. Theconnections are made tight by any suitable fire-proof packing.

The chimney connection is formed in the following manner: Aring 17, Fig.5, is cast on the pipe 16, which forms a shoulder, bearing on the edgeof the openingin the cap 13. The collar 18 circumscribes the pipe 16loosely, having an annular lap, over the ring 17. The pipe 16 isadjusted in proper position relative to the chimney and set in cementand the collar 18 is then bolted to the cap 13, thus securng the pipe inposition, after which cement is placed around the joint making the sameperfectly tight.

In case the radiating pipes and their cmnections become clogged oroverloaded with soot, they are readily cleared of the same through theextensions 43, Figs. 1, 2 and 3, which are in open communication withthe connections 9, 10, 11 and 12 and extend to openings in the casing.The outer terminals of the extensions 43 are in contact with the casing29, as shown in Fig. 10, and are provided with lugs and eyes. The collar44 circumscribes the opening in the casing and has eyes corresponding orregistering with the eyes in the extension 43, the outer collar beingbolted to said extension through these eyes with the casingintermediate, thus forming a tight joint. The interior of the cap 45 isprovided with the flanged disk 46 and the exterior face with the lugs47, 47. By a partial turn of the cap 45 the flanged disk 46 engages theextended portion of the lugs containing the eyes in the collar 44. Bysimply removing the cap 45 and placing a piece of lighted oiled waste,or its equivalent, in the opening, the pipes and their connections willbe cleared of all soot lodged therein.

The coking device used in connection with this furnace is constructed asfollows: The front of the fire-pot is provided with the chute 47, Figs.1, 2, 11 and 16, which extends up to the mouth or upper door of thefurnace. Extending entirely across the mouth of the furnace and on anangle of about forty-five degrees, more or less, is the plate 48 theunder side of which is ridged longitudinally, as shown at 49 in Fig. 13,said figure being a cross-section of the plate. Above the ridges andintermediate thereof arethe fines 50.

The solid plate 51, Fig. 11, is secured to the plate 48 and extendsacross the opening and a similar plate 52 attached to the plate 48 belowthe line of the fines 50, extends across as shown, the two plates 51 and52 forming a box with the damper 34 in the front thereof. The interiorof said box is in open connection with the fines 50. When the fire-pot53 is filled with coal up into the chute 47, as far as the mouth of thefurnace, the fire will burn with an intense heat insaid firepot whilethe gas liberated by the coking coal in said chute will pass downthrough the channels 54 formed by the ridges 49 and commingle with theair passing through the fines 50 from the damper 34 and burn with a blueflame extending across the magazine. On each side of the mouth of thefurnace is the shell or elongated lug 55, Fig. 14, which supports theplate 48, the knob or elongated portion 56 being received in the notch57, Fig. 12. This device produces a solid bed of coke in the chute 47,which is forced down into the fire-pot and the chute again filled withcoal.

The heated air passing down through the pipe 1 and up through the pipe 2becomes cooled and, upon entering the combustion chamber, is reheatedand expanded, thereby producing a partial vacuum and accelerating thedraft.

The joints 59 and 60 are cemented and sand packed to insure perfectlytight joints, that is: the channels shown at 59 and 60, Fig. 11, areprovided with cement into which the joining parts are set and theremainder of the space is filled with sand.

In the manufacture of this invention minor changes may be foundnecessary or desirable. I would not therefore have it understood that Iconfine myself to the precise construction and arrangement of the partsherein described, but reserve to myself the right to all changes andmodifications that may be resorted to without departing from the natureof my invention.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a hot air furnace, a series of radiating pipes in opencommunication with each other through connecting pipes and the uppercombustion chamber and the chambers in the cap 13, in combination withthe expanding chamber 14 and the pipe 16, in the manner substantially asand for the purpose set forth.

2. In a hot air furnace, a coking device consisting of a plate providedwith a series of flues and exterior ridges, said plate set on an inclinein the mouth of the furnace, in combination with the damper 34 in openconnec tion with the flues, substantially as and for p

